U.S. patent number 10,477,450 [Application Number 15/755,091] was granted by the patent office on 2019-11-12 for communication system, terminal apparatus, and communication method.
This patent grant is currently assigned to SHARP KABUSHIKI KAISHA. The grantee listed for this patent is SHARP KABUSHIKI KAISHA. Invention is credited to Yasuhiro Hamaguchi, Hiromichi Tomeba, Tomoki Yoshimura.
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United States Patent |
10,477,450 |
Yoshimura , et al. |
November 12, 2019 |
Communication system, terminal apparatus, and communication
method
Abstract
A bi-directional communication method needs to be switched on
the basis of cost of bi-directional communication. Provided is a
communication system including a first terminal apparatus and a
second terminal apparatus, in which the first terminal apparatus
includes a radio unit that transmits a first signal by using a
first communication path that is a direct communication path to the
second terminal apparatus, the second terminal apparatus includes a
radio unit that transmits a second signal by using a second
communication path that is a communication path different from the
first communication path, and the first terminal apparatus
transmits the first signal on the basis of a feature amount of the
second signal transmitted by the second terminal apparatus.
Inventors: |
Yoshimura; Tomoki (Sakai,
JP), Tomeba; Hiromichi (Sakai, JP),
Hamaguchi; Yasuhiro (Sakai, JP) |
Applicant: |
Name |
City |
State |
Country |
Type |
SHARP KABUSHIKI KAISHA |
Sakai, Osaka |
N/A |
JP |
|
|
Assignee: |
SHARP KABUSHIKI KAISHA (Sakai,
Osaka, JP)
|
Family
ID: |
58187512 |
Appl.
No.: |
15/755,091 |
Filed: |
August 26, 2016 |
PCT
Filed: |
August 26, 2016 |
PCT No.: |
PCT/JP2016/075037 |
371(c)(1),(2),(4) Date: |
February 26, 2018 |
PCT
Pub. No.: |
WO2017/038703 |
PCT
Pub. Date: |
March 09, 2017 |
Prior Publication Data
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|
|
|
Document
Identifier |
Publication Date |
|
US 20180262966 A1 |
Sep 13, 2018 |
|
Foreign Application Priority Data
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|
|
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Aug 31, 2015 [JP] |
|
|
2015-170060 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04W
40/36 (20130101); H04W 76/15 (20180201); H04W
40/02 (20130101); H04W 40/12 (20130101); H04M
11/00 (20130101); H04W 40/04 (20130101); H04W
84/18 (20130101); H04W 76/14 (20180201); H04W
88/04 (20130101); H04W 92/18 (20130101) |
Current International
Class: |
H04W
40/04 (20090101); H04W 40/36 (20090101); H04W
76/14 (20180101); H04W 76/15 (20180101); H04W
84/18 (20090101); H04W 40/12 (20090101); H04W
40/02 (20090101); H04M 11/00 (20060101); H04W
88/04 (20090101); H04W 92/18 (20090101) |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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5438637 |
|
Mar 2014 |
|
JP |
|
2014-082637 |
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May 2014 |
|
JP |
|
2014-225813 |
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Dec 2014 |
|
JP |
|
Primary Examiner: Patel; Chandrahas B
Attorney, Agent or Firm: ScienBiziP, P.C.
Claims
The invention claimed is:
1. A first terminal apparatus that communicates with a second
terminal apparatus, the first terminal apparatus comprising: a
radio unit that transmits a first signal by using a first
communication path that is a direct communication path to the
second terminal apparatus, the radio unit receives a second signal
transmitted by using a second communication path different from the
first communication path, wherein the first signal is transmitted
on a basis of a feature amount of the second signal, and a required
transmission rate of data transfer using the first communication
path is smaller than a required transmission rate of data transfer
using the second communication path.
2. The first terminal apparatus according to claim 1, wherein a
frequency resource used for the second communication path is
allocated by transmitting a scheduling request.
3. The first terminal apparatus according to claim 1, wherein a
required transmission delay amount of data transfer using the first
communication path is smaller than a required transmission delay
amount of data transfer using the second communication path.
4. The first terminal apparatus according to claim 1, wherein a
frequency resource used for the first communication path is
allocated in advance.
5. A first terminal apparatus that communicates with a second
terminal apparatus, the first terminal apparatus comprising: a
radio unit that transmits a first signal by using a first
communication path that is a direct communication path to the
second terminal apparatus, the radio unit receives a second signal
transmitted by using a second communication path different from the
first communication path, wherein the first signal is transmitted
on a basis of a feature amount of the second signal, and a required
transmission delay amount of data transfer using the first
communication path is smaller than a required transmission delay
amount of data transfer using the second communication path.
6. The first terminal apparatus according to claim 5, wherein a
required transmission rate of data transfer using the first
communication path is smaller than a required transmission rate of
data transfer using the second communication path.
7. A first terminal apparatus that communicates with a second
terminal apparatus, the first terminal apparatus comprising: a
radio unit that transmits a first signal by using a first
communication path that is a direct communication path to the
second terminal apparatus, the radio unit receives a second signal
transmitted by using a second communication path different from the
first communication path, wherein the first signal is transmitted
on a basis of a feature amount of the second signal, and a
frequency resource used for the first communication path is
allocated in advance.
Description
TECHNICAL FIELD
The present invention relates to a communication system, a terminal
apparatus, and a communication method.
BACKGROUND ART
Recently, a study has been made in which remote control is
performed by performing communication with a remote apparatus that
is connected in a radio manner. The radio connection makes it
possible to start or stop an operation or give a command or the
like by grasping an operation state or the like of the remote
apparatus.
For example, a study has been made in which an apparatus with a
radio communication function is mounted, for example, in a motor
vehicle that is to run, and the apparatus is remotely controlled on
the basis of a video image captured by a camera oriented in a
direction in which the motor vehicle runs. As the remote control is
realized, a person who controls the apparatus does not need to be
in the same motor vehicle, so that efficiency of a series of
operations is improved.
In the example described above, since an apparatus (remotely
controlled apparatus) that is to be remotely controlled has been
mounted in the motor vehicle that is running, a technique for
low-delay remote control is required. In addition, the video image
captured by the camera needs to be transmitted to an apparatus (a
remote controlling apparatus, a remote controller, or a remote
control) that the person who performs the remote control has.
That is, the following two technical requirements need to be
satisfied in order to improve efficiency. First, communication from
the remote controlling apparatus to the remotely controlled
apparatus needs to satisfy a predetermined low-delay performance.
Second, communication from the remotely controlled apparatus to the
remote controlling apparatus needs to satisfy a predetermined
communication capacity and further satisfy the
lowest-possible-delay performance.
For example, in a case where a distance between the remote
controlling apparatus and the remotely controlled apparatus is
short and the apparatuses are connected to each other in a system,
such as wireless LAN or Bluetooth (registered trademark), in which
short-range communication is assumed, it is considered that the
technical requirements described above are able to be satisfied
relatively easily. However, it is reasonable to assume that the
remote control is generally performed when one goes away and is
difficult to perform control or when one goes away and efficiency
of control is significantly reduced.
In a case where the distance between the remote controlling
apparatus and the remotely controlled apparatus is long, a system
with a large coverage, such as an LTE (Long Term Evolution) system
whose standardization is under way in the 3GPP (Third Generation
Partnership Project) or a WiMAX (registered trademark) system, is
suitably used. In the LTE system, a macro cell (eNB, base station
apparatus) manages a wide coverage and the remotely controlled
apparatus and the remote controlling apparatus are able to perform
communication via the macro cell. In the LTE system, Prose (D2D,
Device to Device, direct communication, apparatus-to-apparatus
communication, device-to-device communication, or the like) is
prescribed, and the remote controlling apparatus and the remotely
controlled apparatus perform direct communication, so that a
low-delay system is realized. PTL 1 discloses an invention in which
direct communication and indirect communication (relaying
communication, relay, or the like) which uses a relaying station
are switched on the basis of cost of the communication.
CITATION LIST
Patent Literature
PTL 1: Japanese Patent No. 5438637
SUMMARY OF INVENTION
Technical Problem
However, a method according to PTL 1 merely discloses the switching
in consideration of cost of the communication only in one
direction. In order to solve the aforementioned problems, a method
of bi-directional communication needs to be switched on the basis
of cost (low delay and a transmission capacity in the example
described above) of the bi-directional communication.
Solution to Problem
In order to solve the aforementioned problems, a communication
system, a terminal apparatus, and a communication method according
to an aspect of the invention are provided as follows.
(1) That is, a communication system that is an aspect of the
invention is a communication system including a first terminal
apparatus and a second terminal apparatus, in which the first
terminal apparatus includes a radio unit that transmits a first
signal by using a first communication path that is a direct
communication path to the second terminal apparatus, the second
terminal apparatus includes a radio unit that transmits a second
signal by using a second communication path that is a communication
path different from the first communication path, and the first
terminal apparatus transmits the first signal on a basis of a
feature amount of the second signal transmitted by the second
terminal apparatus.
(2) A communication system that is an aspect of the invention is
the communication system according to (1), in which a required
transmission rate of data transfer using the first communication
path is smaller than a required transmission rate of data transfer
using the second communication path.
(3) A communication system that is an aspect of the invention is
the communication system according to (1), in which a required
transmission delay amount of data transfer using the first
communication path is smaller than a required transmission delay
amount of data transfer using the second communication path.
(4) A communication system that is an aspect of the invention is
the communication system according to (1), in which a frequency
resource used for the first communication path is allocated in
advance.
(5) A communication system that is an aspect of the invention is
the communication system according to (1), in which a frequency
resource used for the second communication path is allocated by
transmitting a scheduling request.
(6) A terminal apparatus that is an aspect of the invention
includes a first terminal apparatus that communicates with a second
terminal apparatus, in which the first terminal apparatus includes
a radio unit that transmits a first signal by using a first
communication path that is a direct communication path to the
second terminal apparatus, the first terminal apparatus receives a
second signal transmitted by using a second communication path that
is a communication path different from the first communication
path, and the first signal is transmitted on a basis of a feature
amount of the second signal.
(7) A communication method of a terminal apparatus that is an
aspect of the invention is a communication method of a first
terminal apparatus that communicates with a second terminal
apparatus, and the communication method includes the steps of:
transmitting a first signal by using a first communication path
that is a direct communication path to the second terminal
apparatus, receiving a second signal transmitted by using a second
communication path that is a communication path different from the
first communication path, and transmitting the first signal on a
basis of a feature amount of the second signal.
Advantageous Effects of Invention
According to the invention, a communication system is able to
constitute a suitable radio network.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 illustrates an example of a configuration of a radio
communication system according to an aspect of the invention.
FIG. 2 illustrates an example of an apparatus configuration of a
remote-controlled apparatus according to an aspect of the
invention.
FIG. 3 illustrates an example of an apparatus configuration of a
remote apparatus according to an aspect of the invention.
FIG. 4 illustrates an example of an apparatus configuration of a
relaying apparatus according to an aspect of the invention.
FIG. 5 illustrates an example of occurrence of delay when the
remote apparatus transmits remote information to the
remote-controlled apparatus according to an aspect of the
invention.
FIG. 6 illustrates an example of occurrence of delay when the
remote apparatus transmits remote information to the
remote-controlled apparatus via the relaying apparatus according to
an aspect of the invention.
FIG. 7 illustrates an example of a relationship between each of
communication methods and delay according to an aspect of the
invention.
FIG. 8 illustrates an example of occurrence of delay when the
remote-controlled apparatus transmits remote information to the
remote-controlled apparatus via the relaying apparatus according to
an aspect of the invention.
FIG. 9 illustrates an example of a configuration of a relaying
apparatus according to an aspect of the invention.
DESCRIPTION OF EMBODIMENTS
[1. First Embodiment]
FIG. 1 illustrates an example of a configuration of a radio
communication system according to the present embodiment. A radio
communication system 1-1 is configured to include a terminal
apparatus 2a-1, a terminal apparatus 2b-1, and a terminal apparatus
3-1. The terminal apparatus 2a-1 and the terminal apparatus 2b-1
have a function of performing direct communications 4a-1 and 4b-1
without using a relaying apparatus (a relaying station, a relay
station, a relay apparatus, an indirect communication apparatus, or
the like). The direct communication is referred to also as D2D, D2D
communication, line-of-sight communication, or the like. The
terminal apparatus 2a-1 and the terminal apparatus 2b-1 have a
function of performing relaying communications 5a-1, 5b-1, 6a-1,
and 6b-1 via the relaying apparatus. The relaying communication is
referred to also as indirect communication, relay communication, or
the like. Note that, the terminal apparatuses 2a-1 and 2b-1 are
collectively referred to also as a terminal apparatus 2-1. The
direct communications 4a-1 and 4b-1 are collectively referred to
also as a direct communication 4-1, the relaying communications
5a-1 and 5b-1 are referred to also as a relaying communication 5-1,
and the relaying communications 6a-1 and 6b-1 are referred to also
as a relaying communication 6-1.
The radio communication system 1-1 may have a coverage (a cell
size, a communication available range, a connection available
range, or the like) different from that of a relaying apparatus
3-1.
A relaying apparatus 4-1 may be an apparatus having a function
similar to that of the terminal apparatus 2-1, may be a base
station apparatus or the like (eNB, BS (Base Station)) used in an
LTE (Long Term Evolution) system whose standardization is under way
in the 3GPP (Third Generation Partnership Project), may be an AP
(Access Point) or a STA (Station) that is used in the IEEE802.11
(wireless LAN, WLAN (Wireless LAN)) whose standardization is under
way in the IEEE (Institute of Electrical and Electronics
Engineers), may be an apparatus that is compatible with Bluetooth
(registered trademark) or ZigBee whose standardization is under way
in the IEEE802.15, or may be an apparatus that is compatible with
WiMAX (registered trademark) whose standardization is under way in
the IEEE802.16. The relaying apparatus 4-1 may be an apparatus that
has a communication scheme other than the communication schemes
described above or a communication apparatus that has a plurality
of communication schemes.
The relaying apparatus 4-1 may be a small base station (a small
cell, a micro-cell, a pico-cell, a femto-cell, a home eNB, or the
like).
Description will be given below by assuming that the terminal
apparatus 2a-1 is a remotely controlled terminal apparatus and the
terminal apparatus 2b-1 is a remote controlling terminal apparatus.
The terminal apparatus 2a-1 is referred to also as a remotely
controlled terminal apparatus 2a-1 and the terminal apparatus 2b-1
is referred to also as a remote controlling terminal apparatus
2b-1. The remotely controlled terminal apparatus is referred to
also as a remote-controlled apparatus and the remote controlling
terminal apparatus is referred to also as a remote apparatus, a
remote controller, a remote control, or the like.
FIG. 2 illustrates an example of an apparatus configuration of the
remote-controlled apparatus 2a-1. The remote-controlled apparatus
2a-1 is configured to include a part or all of an information
acquisition unit 21a-1, a communication method selection unit
22a-1, and a communication unit 23a-1. The information acquisition
unit 21a-1 processes environment information (which may be
information acquired by a sensor, image information, moving image
information, or other information, for example) acquired by the
remote-controlled apparatus 2a-1 or an apparatus that is allowed to
communicate with the remote-controlled apparatus 2a-1, and
generates information about an amount of the environment
information and information about properties (a requirement
condition related to a communication capacity, a delay performance,
connectivity, or the like) of the environment information. The
information acquisition unit 21a-1 has a function of notifying the
communication method selection unit 22a-1 of the information about
the amount of the environment information, the information about
the properties of the environment information, and a part or all of
the environment information. The information acquisition unit 21a-1
has a function of notifying the communication unit 23a-1 of the
information about the amount of the environment information, the
information about the properties of the environment information,
and a part or all of the environment information.
The communication method selection unit 22a-1 has a function of
selecting a communication method on the basis of the information
about the amount of the environment information, the information
about the properties of the environment information, or the
environment information, and generating information about the
communication method. In a case where the remote-controlled
apparatus 2a-1 does not include the communication method selection
unit 22a-1, the communication method is set by using information
acquired from outside, and details thereof will be described
later.
The communication unit 23a-1 is configured to include a part or all
of a higher layer unit 231a-1, a communication method application
unit 232a-1, a resource control unit 232a-1, a frame generation
unit 235a-1, a radio transmission unit 236a-1, an antenna unit
237a-1, and a radio reception unit 238a-1.
The higher layer unit 231a-1 is connected to a different network or
an apparatus (for example, but not limited to, the information
acquisition unit 21a-1) and has a function of acquiring information
to the remote apparatus 2b-1. The higher layer unit 231a-1 also has
a function of notifying the different network or the apparatus of
information about remote control, which is acquired from the radio
reception unit. Further, the higher layer unit 231a-1 has a
function of notifying the communication method application unit
232a-1 of the information about a communication method or the
environment information that is acquired from the communication
method selection unit 22a-1 or the radio reception unit 238a-1.
The communication method application unit 232a-1 has a function of
selecting a communication method on the basis of the information
about the communication method and generating information
(communication method information) about the selection of the
communication method. The communication method application unit
232a-1 has a function of notifying the resource control unit 233a-1
of the environment information and the communication method
information.
The resource control unit 233a-1 has a function of selecting a
radio resource (also referred to as a resource or the like) used in
radio communication. The radio resource is, for example, a
frequency, a space, a time, a code, or the like, and the resource
control unit 233a-1 may use different resource selection methods in
accordance with the communication method information. An example of
the resource selection method will be described later. The resource
control unit 233a-1 has a function of notifying the frame
generation unit 234a-1 of the communication method information and
the environment information.
The frame generation unit 235a-1 has a function of generating a
physical layer frame. The frame generation unit 235a-1 has a
function of notifying the control information unit 234a-1 of the
communication method information. The frame generation unit 235a-1
has a function of applying, on the basis of the communication
method information, processing such as error correction coding,
modulation, resource mapping, or precoding filter multiplication to
the environment information or control information which is
generated by the control information unit 234a-1 and generating a
physical layer frame. The frame generation unit 235a-1 has a
function of notifying the radio transmission unit 236a-1 of the
physical layer frame and the communication method information.
The control information unit 234a-1 has a function of generating
control information on the basis of the communication method
information. The control information is information that is used to
perform control for radio communication and is able to include, for
example, information indicating an address of a transmission
source, information indicating an address of a transmission
destination, information about channel quality, or the like. The
information included in the control information varies depending on
a communication method.
The radio transmission unit 236a-1 has a function of generating a
carrier wave signal from the physical layer frame on the basis of
the communication method information. Processing performed by the
radio transmission unit 236a-1 includes digital-analog conversion,
filtering, frequency conversion from a baseband to an RF band, or
the like. The radio transmission unit 237a-1 has a function of
notifying the antenna unit 237a-1 of the carrier wave signal.
The antenna unit 237a-1 has a function of transmitting the carrier
wave signal to a radio space. The antenna unit 237a-1 has a
function of notifying the radio reception unit 238a-1 of the
carrier wave signal received from the radio space.
The radio reception unit 238a-1 has a function of generating a
physical layer frame from the carrier wave signal. The radio
reception unit 238a-1 also has a function of acquiring information
from the physical layer frame and notifying the higher layer unit
231a-1 or the communication method application unit 232a-1 of the
information (for example, information about a communication method,
communication method information, or the like). Processing
performed by the radio reception unit 238a-1 includes frequency
conversion processing, filtering, analog-digital conversion, or the
like.
FIG. 3 illustrates an example of an apparatus configuration of the
remote apparatus 2b-1. The remote apparatus 2b-1 is configured to
include a part or all of an information acquisition unit 21b-1, a
communication method selection unit 22b-1, and a communication unit
23b-1. The information acquisition unit 21b-1 acquires environment
information (sensor information, moving image information, or
information (remote control information, remote information, or the
like) used to remotely control the remote-controlled apparatus
2a-1) acquired by a network or an apparatus that is connected to
the remote apparatus 2b-1.
Note that, hereinafter, unless otherwise specified, environment
information acquired by the information acquisition unit 21b-1 is
referred to as remote control information or remote information,
and environment information acquired by the information acquisition
unit 21a-1 is referred to as environment information. The
information acquisition unit 21b-1 has a function of generating
information about a remote control information amount of the remote
control information and information about properties (a requirement
condition related to a communication capacity, a delay performance,
connectivity, or the like) of the remote control information. The
information acquisition unit 21b-1 has a function of notifying the
communication method selection unit 22b-1 of the remote control
information, the information about the amount of the remote control
information, and the information about the properties of the remote
control information. The information acquisition unit 21b-1 also
has a function of notifying the communication unit 23b-1 of the
information about the amount of the environment information, the
information about the properties of the environment information,
and a part or all of the environment information.
The communication method selection unit 22b-1 selects a
communication method on the basis of the information about the
amount of the remote control information or the information about
the properties of the remote control information and generates
communication method information. The communication method
selection unit 22b-1 further has a function of notifying the
communication unit 23b-1 of the communication method
information.
The communication method selection unit 22b-1 has a function of
generating communication selection instruction information that is
used to assist or instruct the communication method selection unit
of the remote-controlled apparatus 2a-1 to select a communication
method. That is, the remote apparatus 2b-1 is able to give an
instruction about a communication method used by the
remote-controlled apparatus 2a-1 to perform communication. Note
that, it is also possible for the remote-controlled apparatus 2a-1
to give an instruction about a communication method used by the
remote apparatus 2b-1 to perform communication. That is, the
remote-controlled apparatus 2a-1 may have a function similar to
that of the remote apparatus 2a-1. Description will be given below
by assuming that the remote apparatus 2b-1 has a function of
generating communication method instruction information that is
used for the remote apparatus 2b-1 to assist or instruct a
communication method of the remote-controlled apparatus 2a-1, for
example.
The communication unit 23b-1 is configured to include a part or all
of a higher layer unit 231b-1, a communication method application
unit 232b-1, a resource control unit 232b-1, a frame generation
unit 235b-1, a radio transmission unit 236b-1, an antenna unit
237b-1, and a radio reception unit 238b-1. Since the communication
unit 23b-1 and a constituent apparatus thereof have functions
similar to those of the communication unit 23a-1 and a
corresponding constituent apparatus, description thereof will be
omitted.
FIG. 4 illustrates an example of an apparatus configuration of the
relaying apparatus 3-1. The relaying apparatus 3-1 is configured to
include a part or all of a higher layer unit 31-1, a resource
control unit 32-1, a control information unit 33-1, a frame
generation unit 34-1, a radio transmission unit 35-1, an antenna
unit 36-1, and a radio reception unit 37-1.
The antenna unit 36-1 has an apparatus configuration similar to
that of the antenna unit 237a-1 and has a function of notifying the
radio reception unit 37-1 of a carrier wave signal that is
received. The antenna unit 36-1 also has a function of
transmitting, to a radio space, the carrier wave signal notified
from the radio transmission unit 35-1.
The radio reception unit 37-1 has a function of generating a
physical layer frame from the carrier wave signal. The radio
reception unit 37-1 also has a function of acquiring information
from the physical layer frame and notifying the higher layer unit
31-1 or the resource control unit 32-1 of the information (for
example, information about a communication method, communication
method information, entire information included in the physical
layer frame (hereinafter, referred to also as reception
information), or the like). Processing performed by the radio
reception unit 37-1 includes frequency conversion processing,
filtering, analog-digital conversion, or the like.
Since the higher layer unit 31-1 has a function similar to that of
the higher layer unit 231a-1 of the remote-controlled apparatus
2a-1, description thereof will be omitted.
The resource control unit 32-1 has a function of performing control
of a radio resource. In a case of transmitting, to a radio space,
information about a communication method, communication method
information, reception information, control information, or other
information so as to be addressed to another apparatus (for
example, the remote-controlled apparatus 2a-1, the remote apparatus
2b-1, or the like), the resource control unit 32-1 allocates a
radio resource to each information and generates resource
allocation information. The resource control unit 32-1 has a
function of notifying the frame generation unit 34-1 of the
information about the communication method, the communication
method information, the reception information, the control
information, or other information, and resource control
information.
The control information unit 33-1 has a function of generating
control information. Detailed control information will be described
later.
The frame generation unit 34-1 has a function of applying, on the
basis of the communication method information, processing such as
error correction coding, modulation, resource mapping, or precoding
filter multiplication, to the information about the communication
method, the communication method information, the reception
information, the control information, or other information and
generating a physical layer frame. The frame generation unit 34-1
has a function of notifying the radio transmission unit 35-1 of the
physical layer frame and the communication method information.
Since the radio transmission unit 35-1 has a function similar to
that of the radio transmission unit 236a-1 of the remote-controlled
apparatus 2a-1, description thereof will be omitted.
The communication method selection unit 22b-1 of the remote
apparatus 2b-1 has a function of selecting a communication method
suitable for the system on the basis of one or both of the remote
control information and the environment information. Suitableness
for the system may mean that the remote apparatus 2b-1 is able to
suitably receive the environment information transmitted from the
remote-controlled apparatus 2a-1 and that the remote-controlled
apparatus 2a-1 is able to suitably receive the remote information
transmitted from the remote apparatus 2b-1.
The remote apparatus 2b-1 and the remote-controlled apparatus 2a-1
may have different requirement conditions to suitably receive the
environment information and the remote information. For example, a
requirement condition for the remote information may be performance
related to low-delay (latency) and a requirement condition for the
environment information may be performance related to
large-capacity transmission.
FIG. 5 illustrates an example of occurrence of delay when the
remote apparatus 2b-1 transmits remote information to the
remote-controlled apparatus 2a-1. In the remote apparatus 2b-1,
remote control information is generated at a time Ta. After the
remote control information is generated, the remote apparatus 2b-1
starts information processing at a time Tb and ends the information
processing at a time Tc. The information processing performed by
the remote apparatus 2b-1 includes selection of a communication
method performed by the communication method selection unit 22b-1
of the remote apparatus 2b-1, control of a radio resource performed
by the communication unit 23b-1, generation of a physical layer
frame, and the like. Next, the remote apparatus 2b-1 transmits a
carrier wave signal to the remote-controlled apparatus 2a-1 at a
time Td, and the remote-controlled apparatus 2a-1 receives the
carrier wave signal. After that, the remote-controlled apparatus
2a-1 starts information processing at a time Te and ends the
information processing at a time Tf. The information processing
performed by the remote-controlled apparatus 2a-1 includes
generation of a physical layer frame performed by the communication
unit 23a-1 of the remote-controlled apparatus 2a-1, and extraction
of remote control information.
A difference between any two times of the times Ta, Tb, Tc, Td, Te,
and Tf is able to be defined as delay. That is, since the
requirement condition related to delay suitable for the system
varies depending on an assumed system, the delay may be a time
difference |Tf-Ta| between Ta and Tf or a time difference |Te-Tc|
between Tc and Te, for example.
FIG. 6 illustrates an example of occurrence of delay when the
remote apparatus 2b-1 transmits remote information to the
remote-controlled apparatus 2a-1 via the relaying apparatus 3-1. In
the remote apparatus 2b-1, remote control information is generated
at a time Ta. The remote apparatus 2b-1 starts information
processing at a time Tb and ends the information processing at a
time Tc. Next, the remote apparatus 2b-1 transmits a carrier wave
signal to a radio space at a time Td and the relaying apparatus 3-1
receives the carrier wave signal. After that, the relaying
apparatus 3-1 starts information processing at a time Te and ends
the information processing at a time Tf. The information processing
performed by the relaying apparatus includes generation of a
physical layer frame performed by the radio reception unit 37-1 of
the relaying apparatus 3-1, transmission standby performed by the
higher layer unit 31-1, control of a radio resource performed by
the resource control unit 32-1, generation of a physical layer
frame performed by the frame generation unit 34-1, and the like.
Subsequently, the relaying apparatus 3-1 transmits a carrier wave
signal to a radio space at a time Tg and the remote-controlled
apparatus 2a-1 receives the carrier wave signal. Then, the
remote-controlled apparatus 2a-1 starts information processing at a
time Th and ends the information processing at a time Ti.
A difference between any two times of the times Ta, Tb, Tc, Td, Te,
Tf, Tg, Th, and Ti is able to be defined as delay. That is, since
the requirement condition related to delay suitable for the system
varies depending on an assumed system, the delay may be a time
difference |Tf-Ta| between Ta and Tf or a time difference |Te-Tc|
between Tc and Te, for example.
It is possible to understand that the requirement related to delay
is that a delay TL satisfies the requirement condition related to
delay, TL<R. Note that, it is a required value related to
delay.
It is suitable for the system to transmit the remote information
from the remote apparatus 2b-1 to the remote-controlled apparatus
2a-1 so that the requirement condition related to delay, TL<R is
satisfied. The communication method selection unit 22b-1 of the
remote apparatus 2b-1 has a function of selecting a communication
method in accordance with the requirement condition related to
delay. Note that, description will be given below by assuming that
delay TL=Tf-Ta is set in a case of direct communication and
TL=Ti-Ta is set in a case of relaying communication, for
example.
FIG. 7 illustrates an example of a relationship between each of
communication methods and delay. The communication method has
different delay in accordance with a communication standard, a
communication scheme, and a communication path. For example, in a
case where the LTE is used as the communication standard and the
communication path is relaying communication, the delay is T1 [ms].
Here, when Any is indicated as the communication scheme, it means
that the communication scheme is not limited. In a case where the
LTE is used as the communication standard and the communication
scheme is D2D, the communication path is direct communication and
the delay is T2 [ms]. The communication method selection unit 22b-1
is able to select a communication method suitable for the system on
the basis of the requirement condition of the remote control
information.
The communication method selection unit 22b-1 is able to generate
communication selection instruction information that is used to
assist or instruct the communication method selection unit 22a-1 of
the remote-controlled apparatus 2a-1 to select a communication
method.
The communication selection instruction information will be
described. The remote apparatus 2b-1 is able to use the
communication selection instruction information to cause the
remote-controlled apparatus 2b-1 to select a communication method
different from the communication method selected by the remote
apparatus 2b-1. When the remote apparatus 2b-1 and the
remote-controlled apparatus 2a-1 select the same communication
method, performance of delay, a communication capacity, or the like
is deteriorated due to collision of radio resources, for example,
so that a communication method suitable for the system may not be
selected. Thus, with use of the communication selection instruction
information, it is possible to assist or instruct the
remote-controlled apparatus 2a-1 to select a communication method
so that a communication method suitable for the system is
selected.
The communication method selection unit 22a-1 of the
remote-controlled apparatus 2a-1 has a function of selecting a
communication method on the basis of information about the amount
of the environment information, information about properties of the
environment information, the communication selection instruction
information, or the like.
A requirement for large-capacity communication is able to be
considered as a requirement related to an amount obtained by
averaging the amount of communication information in a time. That
is, it may be considered that the requirement for large-capacity
communication is that an information amount IA that is obtained by
performing averaging in all or a part of the time during which
communication is performed and the requirement condition TR satisfy
IA>TR.
A case where the requirement condition related to delay is set to
remote information and the requirement condition related to
large-capacity communication is set to environment information will
be described below, for example.
In an aspect of the present embodiment, each of the
remote-controlled apparatus 2a-1 and the remote apparatus 2b-1
complies with the standard defined by the 3GPP and the relaying
apparatus has a function of a base station apparatus. Since the
requirement condition related to delay is set to the remote
information, the requirement condition related to delay is set to
the remote apparatus 2b-1, so that the communication method
selection unit 22b-1 selects the direct communication 4a-1. As the
standard defined by the 3GPP, there is a standard by which D2D
(Prose, line-of-sight communication, direct communication,
Sidelink) is realized. With use of a broadcast signal (SIB (System
Information Base), MIB (Master Information Base), or the like) or
RRC (Radio Resource Control) signaling, a base station apparatus
3-1 notifies the remote apparatus 2b-1 of information about a
resource that may be used for D2D communication. For example, the
information about a resource that may be used for D2D communication
is able to be set on the basis of a frequency or a time resource.
The information about a resource that may be used for D2D
communication is also referred to as a resource pool (radio
resource candidate information) or the like.
On the basis of the resource pool, the remote apparatus 2b-1
decides a radio resource used for the direct communication 4a-1. As
a method for deciding the radio resource used for the direct
communication 4a-1 by the remote apparatus 2b-1, there are two
methods of a method (an autonomous decision method, a contention
method, Contention base, Contention, Transmission mode 2 (TM2), or
the like) for making decision in an autonomous and distributed
manner and a method (an allocation method, a scheduling method,
Transmission mode 1, or the like) allocated by an apparatus that
has the function of a base station apparatus.
The remote apparatus 2b-1 has an autonomous decision method for
autonomously selecting a radio resource on the basis of the
resource pool. With the autonomous decision method, the radio
resource is able to be reserved immediately after the remote
information is generated, and therefore it is assumed that the
requirement condition related to delay is suitably satisfied. On
the other hand, in a case where an apparatus other than the remote
apparatus 2b-1 selects the same radio resource, radio resource
collision or the like may occur. Note that, the remote apparatus
2b-1 is also able to carry out the autonomous decision method
without using the resource pool.
The remote apparatus 2b-1 is able to acquire a radio resource by an
allocation method. The remote apparatus 2b-1 transmits, to an
apparatus (for example, the relaying apparatus 3-1) that has the
function of a base station apparatus, a signal to request
allocation of a radio resource (Scheduling Request (SR) or the
like). As radio resource allocation information, the apparatus that
has the function of a base station apparatus transmits, to the
remote apparatus 2b-1, a PDCCH (Physical Downlink Control Channel)
or ePDCCH each of which is a physical channel by a format according
to DCI format 5 or other formats. The remote apparatus 2b-1
receives the PDCCH or ePDCCH as the format according to DCI format
5 or other formats and acquires the radio resource allocation
information. The allocation method may cause delay due to exchange
of control information associated with scheduling, but is suitable
for the system because there is no collision of radio resources
with respect to an apparatus other than the remote apparatus
2b-1.
The remote apparatus 2b-1 that has acquired the radio resource
carries out the direct communication 4a-1. Through the direct
communication 4a-1, the remote apparatus 2b-1 transmits PSSCH
(Physical Sidelink Shared Channel) including the remote
information. Note that, the remote apparatus 2b-1 may include
communication method instruction information in the PSSCH. The
communication method instruction information may be included in
PSCCH (Physical Sidelink Control Channel). The PSCCH is a channel
on which control information for D2D communication is
transmitted.
The communication method instruction information generated by the
remote apparatus 2b-1 is suitably information for instructing the
remote-controlled apparatus 2a-1 not to perform D2D communication.
The communication method instruction information makes it possible
to prevent the remote apparatus 2b-1 and the remote-controlled
apparatus 2a-1 from selecting the same radio resource in D2D and
prevent deterioration of performance of communication by division
of a radio resource.
The remote-controlled apparatus 2a-1 receives the PSSCH transmitted
by the remote apparatus 2b-1 and acquires remote information.
The remote-controlled apparatus 2a-1 transmits the environment
information to the remote apparatus 2b-1. Since the requirement
condition related to large-capacity communication is set to the
environment information, not the direct communication 4b-1 but the
relaying communication 5b-1 and the relaying communication 6b-1 may
be suitably used.
First, the remote-controlled apparats 2a-1 transmits an SR to the
relaying apparatus 3-1 by using the relaying communication 5a-1.
Next, the relaying apparatus 3-1 transmits the PDCCH by a format
according to a specific DCI format by using the relaying
communication 5a-1. The remote-controlled apparatus 2a-1 receives
the PDCCH and acquires radio resource allocation information. The
remote-controlled apparatus 2a-1 then uses a radio resource that is
allocated through the relaying communication 5a-1 and transmits
PUSCH (Physical Uplink Shared Channel) that includes environment
information to the relaying apparatus 3-1.
The relaying apparatus 3-1 receives the PDSCH including the
environment information. Subsequently, the relaying apparatus 3-1
generates PDSCH (Physical Downlink Shared Channel) that includes
the environment information. The relaying apparatus 3-1 also
generates PDCCH that includes information for notifying the radio
resource by which the PDSCH is transmitted and transmits the PDCCH
and the PDSCH.
The remote apparatus 2a-1 acquires the radio resource allocation
information included in the PDCCH, receives the PDCCH on the basis
of the radio resource allocation information, and acquires the
environment information. As indicated above, the remote information
is communicated through the direct communication 4a-1 and the
environment information is communicated through the relaying
communications 5b-1 and 6b-1, so that the remote information is
able to suitably satisfy the requirement condition related to delay
and the environment information is able to suitably satisfy the
requirement related to large-capacity communication.
FIG. 8 illustrates an example of occurrence of delay when the
remote-controlled apparatus 2a-1 transmits remote information to
the remote-controlled apparatus 2b-1 via the relaying apparatus
3-1. First, in the remote-controlled apparatus 2a-1, environment
information is generated at a time Ta, information processing
starts at a time Tb, and the information processing ends at a time
Tc. Next, the remote-controlled apparatus 2a-1 transmits control
information (for example, SR) to the relaying apparatus 3-1 at a
time Td, and the relaying apparatus 3-1 receives the control
information.
The relaying apparatus 3-1 then transmits control information (for
example, radio resource allocation information or the like) to the
remote-controlled apparatus 2a-1 at a time Te and the
remote-controlled apparatus 2a-1 receives the control information.
Next, the remote-controlled apparatus 2a-1 transmits environment
information at a time Tf on the basis of the radio resource
allocation information and the relaying apparatus 3-1 receives the
environment information. The relaying apparatus 3-1 then starts
information processing for information that includes the
environment information at a time Tg and ends the information
processing at a time Th. Subsequently, the relaying apparatus 3-1
transmits the environment information to the remote apparatus 2b-1
at a time Ti and the remote apparatus 2b-1 receives the environment
information. The remote apparatus 2b-1 starts information
processing for information that includes the environment
information at a time Tj and ends the information processing at a
time Tk.
A difference between any two times of the times Ta, Tb, Tc, Td, Te,
Tf, Tg, Th, Ti, Tj, and Tk is able to be defined as delay. That is,
since the requirement condition related to delay suitable for the
system varies depending on an assumed system, the delay may be a
time difference |Tf-Ta| between Ta and Tf or a time difference
|Te-Tc| between Tc and Te, for example.
In another aspect of the present embodiment, each of the
remote-controlled apparatus 2a-1 and the remote apparatus 2b-1
complies with the standard defined by the 3GPP and the relaying
apparatus has the function of a base station apparatus, and
further, the remote-controlled apparatus 2a-1 and the remote
apparatus 2b-1 are able to perform a communication method complying
with radio communication standard, such as wireless LAN or
Bluetooth (registered trademark), other than the standard defined
by the 3GPP in the direct communication 4a-1 and the direct
communication 4b-1, respectively.
In another aspect of the present embodiment, the relaying apparatus
3-1 is constituted by a plurality of relay apparatuses. FIG. 9
illustrates an example of a configuration of the relaying apparatus
3-1. The relaying apparatus 3-1 is configured to include a relay
apparatus 3a-1, a relay apparatus 3b-1, and a relay apparatus 3c-1.
Note that, the configuration of the relaying apparatus 3-1 is not
limited to FIG. 9 and the relaying apparatus 3-1 is able to be
constituted by one or more relay apparatuses. The relay apparatus
3a-1, the relay apparatus 3b-1, and the relay apparatus 3c-1 are
collectively referred to also as a relay apparatus 30-1 or a
relaying apparatus 3-1. The relay apparatuses are connected to each
other by a relay communication 31a-1, a relay communication 31b-1,
a relay communication 32a-1, and a relay communication 32b-1. The
relay communication 31a-1 and the relay communication 31b-i are
collectively referred to also as a relay communication 31-1, the
relay communication 32a-1 and the relay communication 32b-1 are
collectively referred to also as a relay communication 32-1, and
the relay communication 31a-1, the relay communication 31b-1, the
relay communication 32a-1, and the relay communication 32b-1 are
collectively referred to also as a relay communication 300-1.
Note that, a part or all of the relay communication 300-1 may be
wired communication or wireless communication. For example, the
relay apparatus 30-1 may be an RRH (Remote Radio Head). The relay
apparatus 30-1 may form a distributed antenna system. For example,
only the relay apparatus 3b-1 may be a digital signal processing
apparatus (a baseband unit, a baseband processing apparatus, or a
baseband signal processing apparatus).
The relay apparatus 30-1 may be constituted by a small cell. A part
of the relay apparatus 30-1 may be constituted by a small cell and
the other part of the relay apparatus 30-1 may be constituted by an
RRH.
Next, a part of an example of service realized by the communication
system 1-1 described in the present embodiment will be indicated.
Note that, the example of the service realized by the communication
system 1-1 is not limited to the following. It is obvious that the
example indicated below is merely an example of the service.
In the example of the service realized by the communication system
1-1, the remote apparatus 2b-1 remotely controls the
remote-controlled apparatus 2a-1. The remote apparatus 2b-1 is able
to decide a transmission timing (time, time point, or the like) of
remote information on the basis of environment information that is
transmitted by the remote-controlled apparatus 2a-1 and acquired by
the remote apparatus 2b-1. For example, in a case where the
environment information is video image information, at a timing
when a certain feature is extracted from the video image
information (or at a timing delayed by a time period D from a
timing when the extraction is performed, for example, and the time
period D may be dynamically or statically variable or may be always
a fixed value), the remote apparatus 2b-1 is able to start
transmission or remote information is able to be generated. The
remote information may be, for example, information (for example,
but not limited to, information for stopping an operation of the
information acquisition unit 21a-1) for controlling an operation of
the information acquisition unit 21a-1 of the remote-controlled
apparatus 2a-1, information for controlling an operation of the
communication method selection unit 22a-1, information for
controlling an operation of the communication unit 23a-1, or
information for changing a kind (type or the like) of the
environment information acquired by the information acquisition
unit 21a-1. For example, in a case where the remote-controlled
apparatus 21a-1 has acquired video image information as the
environment information, at a timing when the remote information
that includes information for changing a kind of the environment
information acquired by the information acquisition unit 21a-1 to
temperature information is received or a timing delayed by a time
period D1 from a timing when remote information is received,
acquisition of the temperature information is carried out. Note
that, a method for extracting a feature amount is not limited. In
other words, the remote apparatus 2b-1 is able to determine
transmission of the remote information on the basis of the
environment information that is acquired or a feature amount
extracted from the environment information.
As another example of the service realized by the communication
system 1-1, there is a method by which the remote apparatus 2b-1
transmits remote information that includes information for
controlling an operation of another apparatus (for example, but not
limited to, an apparatus that is allowed to communicate information
with the remote-controlled apparatus 2a-1, a motor vehicle, a
robot, a drone (unmanned air vehicle), a self-traveling cleaner, a
personal computer, a display apparatus, lighting, or the like) that
is able to be controlled by the remote-controlled apparatus
2a-1.
Note that, a method for extracting a feature of the environment
information acquired by the remote apparatus 2b-1 is not
limited.
[2. Common in all Embodiments]
A program which runs in the terminal apparatus 2a-1, the terminal
apparatus 2b-1, and the relaying apparatus 3-1 according to an
aspect of the invention is a program that controls a CPU and the
like (program that causes a computer to function) such that the
functions in the aforementioned embodiments concerning an aspect of
the invention are realized. The pieces of information handled by
the apparatuses are temporarily accumulated in a RAM during the
processing thereof, and then stored in various ROMs and HDDs and
read, corrected, and written by the CPU when necessary. A recording
medium that stores the program therein may be any of a
semiconductor medium (for example, a ROM, a nonvolatile memory
card, or the like), an optical recording medium (for example, a
DVD, an MO, an MD, a CD, a BD, or the like), a magnetic recording
medium (for example, a magnetic tape, a flexible disc, or the
like), and the like. Moreover, there is also a case where, by
executing the loaded program, not only the functions of the
aforementioned embodiments are realized, but also by performing
processing in cooperation with an operating system, other
application programs, or the like on the basis of an instruction of
the program, the functions of an aspect of the invention are
realized.
When being distributed in the market, the program is able to be
stored in a portable recording medium and distributed or be
transferred to a server computer connected through a network such
as the Internet. In this case, a storage apparatus of the server
computer is also included in an aspect of the invention. A part or
all of the terminal apparatus 2a-1, the terminal apparatus 2b-1,
and the relaying apparatus 3-1 in the aforementioned embodiments
may be realized as an LSI which is a typical integrated circuit.
Each functional block of the terminal apparatus 2a-1, the terminal
apparatus 2b-1, and the relaying apparatus 3-1 may be individually
formed into a chip, or a part or all thereof may be integrated and
formed into a chip. When each functional block is made into an
integrated circuit, an integrated circuit control unit for
controlling them is added.
Further, a method for making into an integrated circuit is not
limited to the LSI and a dedicated circuit or a versatile processor
may be used for realization. Further, in a case where a technique
for making into an integrated circuit in place of the LSI appears
with advance of a semiconductor technique, an integrated circuit by
the technique is also able to be used.
Note that, the invention of the present application is not limited
to the aforementioned embodiments. The terminal apparatus 2a-1, the
terminal apparatus 2b-1, and the relaying apparatus 3-1 according
to the invention of the present application are not limited to be
applied to a mobile station apparatus, but, needless to say, are
applicable to stationary or unmovable electronic equipment which is
installed indoors or outdoors such as, for example, AV equipment,
kitchen equipment, a cleaning/washing machine, air conditioning
equipment, office equipment, an automatic vending machine, other
domestic equipment, and the like.
As above, the embodiments of the invention have been described in
detail with reference to drawings, but specific configurations are
not limited to the embodiments, and a design and the like which are
not departed from the main subject of the invention are also
included in the scope of claims.
INDUSTRIAL APPLICABILITY
The invention is suitably used for a communication system, a
terminal apparatus, and a communication method.
Note that, the present international application claims priority
from Japanese Patent Application No. 2015-170060 filed on Aug. 31,
2015, and the entire contents of Japanese Patent Application No.
2015-170060 are hereby incorporated herein by reference.
REFERENCE SIGNS LIST
1-1 radio communication system
2a-1, 2b-1 terminal apparatus
3-1 relaying apparatus
3a-1, 3b-1, 3c-1 relay apparatus
31a-1, 31b-1, 32a-1, 32b-1 relay communication
4a-1, 4b-1 direct communication
5a-1, 5b-1, 6a-1, 6b-1 indirect communication
21a-1, 21b-1 information acquisition unit
22a-1, 22b-1 communication method selection unit
23a-1, 23b-1 communication unit
231a-1, 231b-1, 31-1 higher layer unit
232a-1, 232b-1 communication method application unit
233a-1, 233b-1, 32-1 resource control unit
234a-1, 234b-1, 33-1 control information unit
235a-1, 235b-1, 34-1 frame generation unit
236a-1, 236b-1, 35-1 radio transmission unit
237a-1, 237b-1, 36-1 antenna unit
238a-1, 238b-1, 37-1 radio reception unit
* * * * *